Flashcards
networks
Cards in this deck (28)
- 1What is a computer network?Two or more computers connected together to share information and resources
- 2Describe a LANlocal area network
- 3Describe a WANWide area network
- 4What are the advantages of a computer network?Recourse sharing
- 5What are the disadvantages of a computer network?licences are likely to be cheaper than buying several stand licences
- 6What devices are needed to produce a LAN?Network adaptor network medium wired networks cable connectors power supply router network software
- 7What is the purpose of a NIC?the nics coverts the data signals from the nodes into the data signals that can be transferred across the network.
- 8What is the purpose of a Router?Routers work by sending data between networks e.g. over the internet. this is needed is a LAN because it sends the data
- 9What is the purpose of a Hub?A device that connects nodes together. Not intelligent data is sent to all nodes across the whole of the network. This is needed to connected nodes
- 10What is the purpose of a Switch?It sends nodes that the data is intended to.
- 11What is the purpose of a WAP?WAP are networking devices that allow wireless WI-FI devices to connect to a wired network
- 12What is the difference between a Hub and a Switch?a switch sends nodes to the network, a Hub connects nodes together
- 13What is the Internet?it is a huge network of computers all connected together
- 14What is the World Wide Web?the World Wide Web is a collection of webpages found on this network of computers (internet)
- 15What is the purpose of a Modem?it converts digital signals produced by your computer. into anolouge signals that can be sent to a telephone. It connects to ISP.
- 16What is the purpose of an ISP?They use fibre-optics to provide internet access to their customers
- 17What is an IP address?a unique string of numbers separated by full stops that identifies each computer using the internet.
- 18What does HTTP stand for?hyper text transfer protocol
- 19What is a URL?The address of a world wide web page
- 20How is a URL constructed?A URL can be thought of as the address of a web page and is sometimes referred to informally as a web address. A URL is made up of several parts.
- 21What are the three different network topologies?star, bus, ring
- 22What are the advantages / disadvantages of a Star topology?Advantages: One-way system so not affected by heavy traffic
Disadvantages: Uses the most cable which makes it more expensive
An extra hub or switch further increases the cost - 23What are the advantages / disadvantages of a Ring topology?Advantages: One-way system so not affected by heavy traffic
Disadvantages: Cable failure anywhere will affect the whole network
Need to ‘break’ the ring in order to add a new node
All nodes must be switched on - 24What are the advantages / disadvantages of a Bus topology?Advantages: The simplest and cheapest to install and extend
Failure of one node does not affect the rest of the bus network
Disadvantages: The simplest and cheapest to install and extend
Failure of one node does not affect the rest of the bus network - 25List examples of data that need to be kept secureBanking Details, Passwords
- 26What is HTTPS and what is it used for?it defines how messages are formatted and transmitted, and what actions WEB servers and browsers should take in response to various commands
- 27What is encryption?the process of coverting information or data into a code, especially to prevent unauthorised access
- 28What is decryption?the process of transforming data.
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- Flashcards on networks , created by Charlie Smart on 04/12/2017.
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- Charlie Smart
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